I agree with Katie. I've seen some of these threads myself and their afternoon pee was much darker than fmu for them so definitely worth trying. As for the digi, I didn't do one till I was a week late af, they can really take a while to turn positive. I know they're 25mIU but I think it's the way they work rather than the threshold so much. I took all mine apart out of curiosity as I was seeing positives on other tests last cycle, and the digis were getting darker but were still negative despite having some fairly dark blue lines on all three lines. I read somewhere ages ago it's the shade of blue or something, rather than the lines being there as you usually have some kind of lines on them anyway and usually all three lines too, even if you were definitely not pregnant so I wouldn't worry about it